function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Assis 1, Leonardo de & Schimonsky 1, Diego Monteiro von', 1],
    ['Bedoya-Roqueme, Edwin & Tizo-Pedroso, Everton & Barbier, Eder', 1],
    ['Chamberlin, Joseph Conrad', 2],
    ['Mahnert, Volker', 2],
    ['Mahnert, Volker & Sharaf, Mostafa & Aldawood, Abdulrahman S.', 1],
    ['Novák, János & Dányi, László', 1],
    ['Prado, Guilherme C. & Ferreira, Rodrigo L.', 4],
    ['Romero-Ortiz, Catalina & García, Fabian & Villarreal, Eduardo', 1],
    ['Schimonsky, Diego Monteiro Von', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);